Today a White House report said that there's no evidence that Huawei has actually spied on any of its customers, but warned that its gear is vulnerable to hackers.

U.S. officials are concerned that Huawei is a Trojan horse for the Chinese government. They think that the Chinese government can order Huawei to let it spy on its U.S. customers or even to shut down the telecom system if it decides to conduct "cyber war."

Huawei officials claim that its just another international company trying to earn more U.S. business. But the company is secretive, with ties to the Chinese military and a mysterious founder.

Huawei also has a long, nasty history with Cisco, an American competitor. In 2003, the company was found to have copied Cisco's technology. Motorola also had similar complaints with Huawei. Cisco CEO John Chambers said last April that Huawei is the company he fears most.